Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
hai hoi » dai hoi, hai moi, hai hai
ky tang » ky dang, kho tang, ky trong
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky tang) OR (ky nang)) hai hoi. hieu ((ve cai) or (va cam)) luc va hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky tang) OR (ky nang)) hai hoi. hieu ((ve cai) OR (va cam)) luc va hanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky tang) OR (ky nang)) hai hoi. hieu ((ve cai) or (va cam)) luc va hanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky tang) OR (ky nang)) hai hoi. hieu ((ve cai) or (va cam)) luc va hanh tai cuu tre*.